Revert "Coerce data at the very end of building the message"
Revert "Coerce data at the very end of building the message"

This reverts commit b7150c7b552d16aa7100949ea52f050665d19f3f.

inspirehep/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,ronaldevers/raven-python,nikolas/raven-python,Photonomie/raven-python,akalipetis/raven-python,ronaldevers/raven-python,akalipetis/raven-python,jmp0xf/raven-python,inspirehep/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,getsentry/raven-python,ewdurbin/raven-python,collective/mr.poe,lepture/raven-python,jbarbuto/raven-python,johansteffner/raven-python,getsentry/raven-python,recht/raven-python,jmagnusson/raven-python,recht/raven-python,inspirehep/raven-python,Photonomie/raven-python,ewdurbin/raven-python,someonehan/raven-python,percipient/raven-python,ewdurbin/raven-python,akalipetis/raven-python,jmagnusson/raven-python,lepture/raven-python,icereval/raven-python,smarkets/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,smarkets/raven-python,akheron/raven-python,someonehan/raven-python,inspirehep/raven-python,jbarbuto/raven-python,johansteffner/raven-python,recht/raven-python,getsentry/raven-python,icereval/raven-python,jbarbuto/raven-python,akheron/raven-python,jbarbuto/raven-python,smarkets/raven-python,jmp0xf/raven-python,icereval/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,arthurlogilab/raven-python,arthurlogilab/raven-python,hzy/raven-python,nikolas/raven-python,percipient/raven-python,nikolas/raven-python,Photonomie/raven-python,nikolas/raven-python,someonehan/raven-python,hzy/raven-python,hzy/raven-python,percipient/raven-python,jmagnusson/raven-python,icereval/raven-python,johansteffner/raven-python,danriti/raven-python,lepture/raven-python,dbravender/raven-python,arthurlogilab/raven-python,arthurlogilab/raven-python,smarkets/raven-python,ronaldevers/raven-python,danriti/raven-python,danriti/raven-python,dbravender/raven-python,dbravender/raven-python,akheron/raven-python,jmp0xf/raven-python